diff --git a/README.md b/README.md
index 005df4fd..99bc6111 100644
--- a/README.md
+++ b/README.md
@@ -136,6 +136,13 @@ for a quick overview of the supported features.
 | Generator       | `yield i`                       | ✅       |
 | Decorator       | `@cache`                        | ✅       |
 
+## Performance
+
+Currently, pkpy is as fast as cpython 3.9.
+Performance results for cpython 3.9 are applicable to for pkpy.
+
+See https://pocketpy.dev/performance/ for details.
+
 ## Used By
 
 |                                                              | Description                                                  |
diff --git a/docs/performance.md b/docs/performance.md
index 44470cd7..ea7dc02b 100644
--- a/docs/performance.md
+++ b/docs/performance.md
@@ -6,8 +6,8 @@ label: Performance
 
 # Performance
 
-Currently, pkpy is as fast as cpython 3.8.
-**Performance results for cpython 3.8 are applicable to for pkpy.**
+Currently, pkpy is as fast as cpython 3.9.
+**Performance results for cpython 3.9 are applicable to for pkpy.**
 
 Here is a benchmark result of `v1.2.6`.
 Files are located in `benchmarks/`.